Sabi raises $50 million for a brain-sensing baseball cap
Khosla Ventures has led a $50 million seed round in Sabi, a California startup building a baseball cap meant to turn imagined words and trained mental commands into text and instructions for AI assistants. Accel, Initialized Capital, former OpenAI chief product officer Kevin Weil, DST Global, Collaborative Fund and Ascend also invested, Sabi announced on 9 October 2026. Forbes put the valuation at $600 million, citing a person familiar with the deal. The cap is designed to read brain signals through hair with sensors built around a custom EEG chip, and to decode them with a model Sabi says was trained on more than 100,000 hours of labelled recordings. In April, Sabi said its first product would be a beanie available by the end of 2026. The cap will now debut as an early prototype at CES in January, and Forbes reported that it will not be available until 2027. Sabi has named no price and published no peer-reviewed results, and its only accuracy figure, up to 77 per cent, comes from a wired laboratory prototype.